Purlin Bolts
M12 Size PB1230 standard purlin bolt (grade 4.6):
M12 x 30mm with nut

M16 Size PB1645 standard purlin bolt (grade 4.6):
M16 x 45mm with nut

Fascia Bolts
PB1230 fascia bolt (grade 4.6):
M12 x 30mm with nut